Watch



STEM WINDING WATCH.

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(No Model.) 2 Sheets-Sheet 2.

A. CHOPARD.

STEM WlNDING WATCH. No. 250,423. Patented Deo. 6,1881.

UNITED STATES PATENT OFFICEo ALBERT CHOPARD, OF MOUTIER-GRANDVAL,SWITZERLAND, ASSIGNOR TO THE SOCIETE INDUSTRIELLE, OF SAME PLACE.

STEM-WINDING WATCILTI.

SPECIFICATION forming part of Letters Patent No. 250,423, dated December6, 1881,

Application led September 23, 1881. (No model.)

T 0 all whom 'it may concern Be it known that I, ALBERT CHOPARD, ofMoutier-Grandval, in Switzerland, have invented an Improvement in StemWinding Watches, of which the following is a specification.

The object of this invention is to simplify the construction of stemwinding and setting watches, to lessen the cost of the same, and toobtain greater strength and durability in the parts.

In the drawings, Figure 1 represents the mechanism beneath the dialofthe watch. Fig. 2 shows the rocker at the side next to the gearwheels.Fig. 3 is a sectionof the rocker at the line fr y. Figs. 4, 5, and 6 aredetached illustrations of the rocker and gear-wheels in their differentpositions. Fig. 7 shows the plates and bridges of the watch-works. Fig.8 shows the quarter-plate Without the stayplate, and Fig. 9 representsthe under side ofthe stay-plate.

The burr or crown A of the stem-Winder is of usual character, and itsstein pas-ses into the Watch; butinstead of being provided with theusual ratchet-wheels and gear wheels or pinions it is only provided witha gear-wheel, B, that gears into the teeth of the wheel c.

The rocker M is made with three arms, and the spring z acts against oneof these arms. The rocker is pivoted upon a stud, p, Fig. 3, projectingfrom the pillar-plate of the watch, and the screw s, passing into suchstud 19, retains the rocker in position, but allows it to be vibrated.

The wheel c is between the pillar-plate and the rocker M, and saidrocker is recessed for its reception, and there is a tubular hub, o,upon the rocker-plate, that forms the arbor, around which the wheel c isrevolved by the action of the gear B.

The pinion D is pivoted at y upon one arm of the rocker M, and its teethare always in gear with the wheel c.

The arbor F ofthe spring-barrel has at one end a ratchet-wheel, H,between the quarterplate P and the stay-plate N. The pawl n and spring mare recessed in the plate P and retained in place by the plate N. At theother end the arbor F is provided with the gearwheel E, with which thepinion D remains in contact, except when the hands are being set; hencethe crown A ofthe stern can be turned, as indicated by the arrow, Fig.l, to wind up the watch whenever necessary; but should the crown beturned the wrong Way, as indicated by the arrows, Figs. 4 and 5, theparts will not be injured, because the arbor F and wheel E will be heldiirmly by the pawl or click n, and the rocker M will swing and the teethof D separate from the teeth of E, as indicated in Fig. 5, inconsequence of the inclined shape of the sides ofthe teeth and thetendency of the Wheel` c to swing the rocker M when turned in thedirection indicated.

For setting the watch I make use of a pusher acting against the stud xupon the rocker M, to move such rocker M and Wheel D into the positionshown in Fig. 6, and separate the wheel D from the wheel E and bring itinto contact with the wheel G, that is part ot' the gearing ot' thehands. While the parts are held in this position by the pusher the crownof the stem-Winder and the gearing can be turned either way to set thehands forward or backward.

I claim as my invention- The combination, in a stem-winding mechauism,ot' the rocker M, pivoted upon the pillar-plate, the gear-wheel c,turning upon the tubular arbor o' of the rocker M, the wheel D, thearbor of which is upon the rocker M, the wheel B, the stern and crown orhead A, the winding-gear E, and setting-gear G, substantially as setforth.

In testimony whereof` I have signed this specification in the presenceof two subscribing witnesses.

A. CHOPARD.

Witnesses:

ELMER SCHNEIDER, TH. TRUERL.

